Parker AC30 series - Slew Rate

Parameter Reference D-103
AC30V series Variable Speed Drive
Slew Rate
Parameters::Motor Control::Slew Rate
Designed for VOLTS/Hz motor Control Mode.
This function prevents over-current and over-voltage faults occurring due to a rapidly changing setpoint.
PNO Parameter Descriptions
0360 Slew Rate Enable
Enable/Disable slew rate limit
0361 Slew Rate Accel Limit
Maximum rate at which the setpoint can be changed away from zero
0362 Slew Rate Decel Limit
Maximum rate at which the setpoint can be changed towards zero
Functional Description
The Slew Rate limit obtains the setpoint from the output of the application, correctly scaled by the Reference feature and already processed by
the Power Loss Ride Thru and the Ramp Hold features ( if enabled ). The rate of change limits are applied and the setpoint is then passed on for
further processing.
When the braking feature determines that the internal dc link voltage is too high it issues a Hold signal. This causes the Slew Rate limit function
to hold the setpoint at its current value. This typically lasts for only 1ms, time for the excess energy to be dumped into the dynamic braking
resistor.
Ramp
Power Loss
Ride Thru
Ramp Hold
Speed Setpoint path
User
Speed control loop
Slew Rate
( V/Hz only )
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